[ARM] 3569/2: netX: driver for XMAC/XPEC engines
Patch from Sascha Hauer The netX processors have generic network bitstream engines (XMAC/XPEC). This driver adds support for firmware loading and start, stop, reset commands. Signed-off-by: Robert Schwebel <r.schwebel@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Sascha Hauer
Russell King
Родитель
ef70cd4d24
Коммит
8e77da68a6
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@ -7,5 +7,5 @@
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# Object file lists.
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obj-y += time.o generic.o pfifo.o
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obj-y += time.o generic.o pfifo.o xc.o
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@ -0,0 +1,255 @@
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/*
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* arch/arm/mach-netx/xc.c
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*
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* Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/firmware.h>
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#include <linux/mutex.h>
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#include <asm/io.h>
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#include <asm/hardware.h>
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#include <asm/arch/netx-regs.h>
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#include <asm/arch/xc.h>
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static DEFINE_MUTEX(xc_lock);
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static int xc_in_use = 0;
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struct fw_desc {
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unsigned int ofs;
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unsigned int size;
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unsigned int patch_ofs;
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unsigned int patch_entries;
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};
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struct fw_header {
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unsigned int magic;
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unsigned int type;
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unsigned int version;
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unsigned int reserved[5];
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struct fw_desc fw_desc[3];
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} __attribute__ ((packed));
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int xc_stop(struct xc *x)
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{
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writel(RPU_HOLD_PC, x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS);
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writel(TPU_HOLD_PC, x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS);
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writel(XPU_HOLD_PC, x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS);
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return 0;
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}
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int xc_start(struct xc *x)
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{
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writel(0, x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS);
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writel(0, x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS);
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writel(0, x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS);
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return 0;
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}
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int xc_running(struct xc *x)
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{
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return (readl(x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS) & RPU_HOLD_PC)
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|| (readl(x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS) & TPU_HOLD_PC)
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|| (readl(x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS) & XPU_HOLD_PC) ?
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0 : 1;
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}
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int xc_reset(struct xc *x)
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{
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writel(0, x->xpec_base + NETX_XPEC_PC_OFS);
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return 0;
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}
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static int xc_check_ptr(struct xc *x, unsigned long adr, unsigned int size)
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{
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if (adr >= NETX_PA_XMAC(x->no) &&
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adr + size < NETX_PA_XMAC(x->no) + XMAC_MEM_SIZE)
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return 0;
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if (adr >= NETX_PA_XPEC(x->no) &&
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adr + size < NETX_PA_XPEC(x->no) + XPEC_MEM_SIZE)
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return 0;
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dev_err(x->dev, "Illegal pointer in firmware found. aborting\n");
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return -1;
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}
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static int xc_patch(struct xc *x, void *patch, int count)
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{
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unsigned int val, adr;
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unsigned int *data = patch;
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int i;
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for (i = 0; i < count; i++) {
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adr = *data++;
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val = *data++;
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if (xc_check_ptr(x, adr, 4) < 0)
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return -EINVAL;
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writel(val, (void __iomem *)io_p2v(adr));
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}
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return 0;
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}
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int xc_request_firmware(struct xc *x)
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{
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int ret;
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char name[16];
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const struct firmware *fw;
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struct fw_header *head;
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unsigned int size;
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int i;
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void *src;
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unsigned long dst;
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sprintf(name, "xc%d.bin", x->no);
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ret = request_firmware(&fw, name, x->dev);
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if (ret < 0) {
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dev_err(x->dev, "request_firmware failed\n");
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return ret;
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}
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head = (struct fw_header *)fw->data;
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if (head->magic != 0x4e657458) {
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if (head->magic == 0x5874654e) {
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dev_err(x->dev,
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"firmware magic is 'XteN'. Endianess problems?\n");
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ret = -ENODEV;
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goto exit_release_firmware;
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}
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dev_err(x->dev, "unrecognized firmware magic 0x%08x\n",
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head->magic);
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ret = -ENODEV;
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goto exit_release_firmware;
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}
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x->type = head->type;
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x->version = head->version;
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ret = -EINVAL;
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for (i = 0; i < 3; i++) {
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src = fw->data + head->fw_desc[i].ofs;
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dst = *(unsigned int *)src;
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src += sizeof (unsigned int);
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size = head->fw_desc[i].size - sizeof (unsigned int);
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if (xc_check_ptr(x, dst, size))
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goto exit_release_firmware;
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memcpy((void *)io_p2v(dst), src, size);
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src = fw->data + head->fw_desc[i].patch_ofs;
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size = head->fw_desc[i].patch_entries;
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ret = xc_patch(x, src, size);
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if (ret < 0)
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goto exit_release_firmware;
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}
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ret = 0;
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exit_release_firmware:
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release_firmware(fw);
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return ret;
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}
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struct xc *request_xc(int xcno, struct device *dev)
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{
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struct xc *x = NULL;
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mutex_lock(&xc_lock);
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if (xcno > 3)
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goto exit;
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if (xc_in_use & (1 << xcno))
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goto exit;
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x = kmalloc(sizeof (struct xc), GFP_KERNEL);
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if (!x)
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goto exit;
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if (!request_mem_region
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(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE, dev->kobj.name))
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goto exit_free;
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if (!request_mem_region
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(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE, dev->kobj.name))
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goto exit_release_1;
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if (!request_mem_region
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(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE, dev->kobj.name))
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goto exit_release_2;
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x->xpec_base = (void * __iomem)io_p2v(NETX_PA_XPEC(xcno));
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x->xmac_base = (void * __iomem)io_p2v(NETX_PA_XMAC(xcno));
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x->sram_base = ioremap(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE);
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if (!x->sram_base)
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goto exit_release_3;
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x->irq = NETX_IRQ_XPEC(xcno);
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x->no = xcno;
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x->dev = dev;
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xc_in_use |= (1 << xcno);
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goto exit;
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exit_release_3:
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release_mem_region(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE);
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exit_release_2:
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release_mem_region(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE);
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exit_release_1:
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release_mem_region(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE);
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exit_free:
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kfree(x);
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x = NULL;
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exit:
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mutex_unlock(&xc_lock);
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return x;
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}
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void free_xc(struct xc *x)
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{
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int xcno = x->no;
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mutex_lock(&xc_lock);
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iounmap(x->sram_base);
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release_mem_region(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE);
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release_mem_region(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE);
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release_mem_region(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE);
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xc_in_use &= ~(1 << x->no);
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kfree(x);
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mutex_unlock(&xc_lock);
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}
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EXPORT_SYMBOL(free_xc);
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EXPORT_SYMBOL(request_xc);
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EXPORT_SYMBOL(xc_request_firmware);
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EXPORT_SYMBOL(xc_reset);
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EXPORT_SYMBOL(xc_running);
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EXPORT_SYMBOL(xc_start);
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EXPORT_SYMBOL(xc_stop);
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@ -0,0 +1,42 @@
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/*
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* linux/include/asm-arm/arch-netx/xc.h
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*
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* Copyright (C) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __ASM_ARCH_XC_H
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#define __ASM_ARCH_XC_H
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struct xc {
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int no;
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unsigned int type;
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unsigned int version;
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void __iomem *xpec_base;
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void __iomem *xmac_base;
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void __iomem *sram_base;
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int irq;
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struct device *dev;
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};
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int xc_reset(struct xc *x);
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int xc_stop(struct xc* x);
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int xc_start(struct xc *x);
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int xc_running(struct xc *x);
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int xc_request_firmware(struct xc* x);
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struct xc* request_xc(int xcno, struct device *dev);
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void free_xc(struct xc *x);
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#endif /* __ASM_ARCH_XC_H */
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